We are born for synergy, just like the feet, just like the hands, just like the eyes, just like the rows of upper and lower teeth. Working against each other is unnatural, and being annoyed and turning one's back is counterproductive.

Vex not thy spirit at the course of things, they heed not thy vexations

Why do you hunger for length of days? The point of life is to follow reason and the divine spirit and to accept whatever nature sends you. To live in this way is not to fear death, but to hold it in contempt. Death is only a thing of terror for those unable to live in the present. Pass on your way, then, with a smiling face, under the smile of him who bids you go

It is the act of a madman to pursue impossibilities .

Do not think that what is hard for you to master is humanly impossible; but if a thing is humanly possible, consider it to be within your reach.

At day's first light have in readiness, against disinclination to leave your bed, the thought that "I am rising for the work of man."

Turn thy thoughts now to the consideration of thy life, thy life as a child, as a youth, thy manhood, thy old age, for in these also every change was a death. Is this anything to fear?